Actually, you don't need to convert it to be legal on the
roads in the UK if you have personally imported the vehicle. If
you purchased this from a dealer and it was done via a commercial
import route then this should have been done for you already This
normally only means you have a speedometer that reads in MPH and
I have tried to help in providing information how to alter the
odometer and get all those goodies like cruise, active spoiler
and speed limiter sorted out.

Locate the 5th pin, it's the BLUE WIRE
with RED STRIPE and SILVER BANDS,Leave yourself plenty of
wire to work with at the connector end and CUT this wire.
(That is the main speed signal from Speed Sensor No.1)

Connect the INPUT terminal of your speedo
conversion unit to the wire on the harness/loom side (not
the connector side)

Connect the OUTPUT terminal of the
conversion unit to the wire stub left
connected to the connector.(That's the speedo signal bit sorted!)

Now you need power.

12V for the conversion unit can
be found on pin 4. Splice a connector onto this
wire and 'T' off for the power to the converter.

0V can be sourced from any
chassis point. There's one just behind the speedo
head, a screw.

Remove connector T7, this is the one
connected to the far left next to the hazard warning
light switch and should already have been removed to do
the above.

Locate pin 5, again a BLUE WIRE with RED
STRIPE and SILVER BANDS.
(This is exactly the same as the speedo head wire but we
need to modify it
because the signal from speed sensor No.1 is 'T'd earlier
on in the wiring
loom and so the speedo mod will not affect it.)
Again make sure you have enough wire left over at the
connector end and CUT
the wire.

Now connect a NEW piece of wire from the
output of the speedo converter to
the wire stub of the connector T7.

Note: The TRL DSC provides calibrated outputs adjustable
by +/-10% in approx 1.5% increments. It also provides a 1:1 and 5:8 scaled
output signals plus a dedicated speed delimiter output. So THREE funtions
in ONE box!